1. Department of Surgery, Intensive Care Units, Division of Anaesthesia and Intensive Care Medicine, Helsinki University Hospital, Helsinki, Finland
2. Critical Care Medicine Research Group, Department of Intensive Care Medicine, Tampere University Hospital, Tampere, Finland
3. Department of Surgical Sciences, Anaesthesiology and Intensive Care, Uppsala University, Uppsala, Sweden
4. Institute of Biomedicine, University of Eastern Finland, Anatomy, Kuopio, Finland
5. University of Helsinki, Helsinki, Finland